Rotary pump



, a standard D risi or otherwise secured to these slots are Patented Dec. l5, 1925.

THOIAS C. WHITEHEAD, 0l' DETROIT, MICHIGAN.

'1 ROTARY PUIP.

Appunti ma my as, 192s. serial au. 653,234.

To all whom z'tmay concern:

Be it known that'I, THOMAS C. Wurm- HEAD, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michi an, have invented certain new/ and use ul Improvements in Rotary Pumps, of which the following is a specification, reference being-had therein to .the accompanying drawings. p

The invention relates to rotary pumps, being more particularly designed for 'use as a gas pump, and the invention consists in certain features of construction as hereinafter set forth. 4

In the4 drawings: p v Figure 1 is a cross-section through -the Plmlpi .i

FigureQ 1s a longitudlnal sectlon therethrough# I i Figure 3 is a4 plan view"k of a portion of tfhe rotor showing the peripheral seal there- A is a rotor of cylindricalv form which is mounted upon a spindle B and is arran Ved within an outer This casing has a central portion C of a length less than that of the rotor and having its inner wall eccentric to the axis of said rotor. This portion is' preferably supportedupon from a' base E On opposite sides of t e portion C are the housing members F and G. These are provided with inwardly extending flangesl H, which fit about the projecting end portions of the rotor and engage packing rings I surrounding said rotor in grooves therein. Beyond the anges H the sections F and G form chambers for a lubricant and have centrally therein the bearin J for A the spindle. The sections C, F an Gl arebolted each other bythe bolts K e 'ng registering ears.

The rotor tending slots in the portion thereof which registers with the housing section C and in the rotation of the rotor the sealing means is provided with 'radially tx-` the wings L. These wings. are moved outward by centrifugal action blades or 'wings L to travel about the eccentric walllin sealing contact therewith, which` will have the effect of drawing the fluid in through the `inlet port and expellin it through the outlet port. Leakage of t e fluid between the rotor and the-j housing is prevented, by the packing rings I, which latter are coupled by suitable vmeans, such as a drivingpin O, with the rotor to revolve therewith. Thus centrifugal action will assist in pressin the ringsv outward against the ilange H o the housing. To lubricate `the bearings J properly, I preferably provide suitable arms P which pro'ect laterally from the opposite lsides of t ev rotor;

A The pump as' above described is particularly adapted for use in vhousehold refrigerating applaratus where it is desired to compress t e refrigerating agent and to avoid noise such as is occasioned by the opening and closingof the' valves.

While I have described the s eciiic construction of rotary ump, it is o vious that tween the rotor and housing is applicable to other sp'ecic constructions of pump. I

What I claim as my invention is:V

1. .A rotary gas pump comprising a rotor having one or more radial blades slidably connected therewith and of a length le than the length of the rotor, a'housing for the gas surrounding saidrotor having an eccentric wall with which said blades contact, and concentric portions containing oil on the opposite ends of said eccentric portion surrounding the end portions of the`A rotor, and sealing rings mounted upon and I movable with saidrotor en agin said surrounding concentric wall o the ousing.

v2. A' rota pum comprisi ,a rotor, a plurality o radial'blades slida ly enga ing slots 1n said rotor, a housing surroun ing said rotor and having ian-eccentric wall with which the outer edges'of said blades contact,and concentric portions on opposite ends of said eccentric portion -surrounding extensions of said rotor, and packing rings engaging ooves in said rotorand beati against t e concentric portions `of sai housing.

3. A-rotary` pump' com member for gas suppo a rotor having its axis ,eccentric to housing member and arranged within the same, complementary housing members for oil clamped at opposite yends of said firstupon a stands los I risingk alhousxlng f 'said 'l V mentioned housing member concentric with the axis of said rotor and surrounding eX- tensions thereof, packing rings engaging grooves in said rotor and bearing against said concentric portions of the housing to prevent the passage of oil from the com lementary housing members to ythe rotor ousing, and bearings for the spindle of said rotor in said complementary housing member.

` 4. In a rotary pump, the combination `with a rotor and a housing having nonconcentric portions, of concentric portions on said rotor and casing forming a sealing joint therebetween.

5. In a rotary pump, .the combinationv 'with a rotor and a housing .having non- -centric portions. A

` 7.111 a rotary pump. the combination outside of said sealing aseaeee with a rotor and a housing therefor, of one or more blades coacting with said rotor and housing, and sealing means at the end of said blades comprising adjacent con centric portions on said rotor and housing, and a ring engaging a groove in the one and bearingagainst the other. j

w8. In a rotary pump, the combination with a rotor and a housing therefor, of sealing means between said rotor and housing, a lubricant chamber in the housing means, a journal bearing for the rotor centrally Within said chamber, and means on said rotor for throwing thel lubricant over said bearing.

9. A gas pump comprising three communicating casings, the intermediate casing being eccentric to the outer casings, a rotor in the intermediate casing, a shaft su porting the rotor journaled in bearings in the outer casings, anges projecting inwardly from the intermediate casing, and means carried by said rotor engageable with said flanges for preventing the flow of oil A from the outer casings to the intermediate casing.

In testi'mo ture.

riioMAs e. unirsi-iran y whereof I affix my signa- 

